Drum brake shoe

Abstract

Drum brake shoe, particularly for a motor vehicle, in which a brake cable ( 64 ) has an end terminal ( 66 ) for attachment to a lever ( 50 ) that acts on the shoe ( 4 ), this shoe comprising a rigid web one edge of which is formed with a cut-out ( 90 ) providing access to the cable ( 64 ) attachment end terminal ( 66 ) to make it easier to detach this cable.

1. Drum brake shoe ( 4 ) comprising a rigid web ( 16 ) and a cylindrical part ( 8 ) that accepts a friction lining, characterized in that an interior edge of the web ( 16 ) has a cut-out ( 90 ) providing access to a brake cable ( 64 ) attachment end terminal ( 66 ) attached to a lever ( 50 ) comprising a cable-accommodating duct ( 60 ) formed with an inclined edge ( 62 ) which diverges from an axis (A) of the duct ( 60 ) towards a drum, the lever ( 50 ) also comprising a ferrule ( 70 ) for guiding the end terminal ( 66 ) when the cable ( 64 ) is being fitted, and an elastic leaf ( 74 ) capable of pushing the end terminal ( 66 ) as the end terminal ( 66 ) leaves the ferrule ( 70 ) so as to house and hold part of the cable ( 64 ) in place in the closed end of the duct ( 60 ), in that the lever ( 50 ) has an outer edge, and in that the cut-out ( 90 ) has a depth outwardly beyond the outer edge of the lever ( 50 ) proximate an axial end ( 80 ) of the duct ( 60 ) to provide access to the end terminal ( 66 ) when attached to the lever ( 50 ). 
     
     
       2. Drum brake shoe according to  claim 1 , characterized in that the cut-out ( 90 ) is near one end ( 20 ) of the shoe ( 4 ) which is capable of pivoting by bearing against a stop ( 24 ) borne by a backplate ( 2 ) of a drum brake. 
     
     
       3. Drum brake shoe according to  claim 2 , characterized in that one side of the cut-out ( 90 ) meets the end ( 20 ) of the shoe. 
     
     
       4. Drum brake shoe according to  claim 1 , characterized in that the cut-out ( 90 ) has inclined sides such that an open end of the cut-out ( 90 ) is wider than a closed end thereof. 
     
     
       5. Drum brake shoe according to  claim 1 , characterized in that the web ( 16 ) has a width, and in that the cut-out ( 90 ) has a depth extending over approximately half the width of the web ( 16 ). 
     
     
       6. Drum brake shoe according to  claim 1 , characterized in that the cut-out ( 90 ) has a length at least equal to its depth. 
     
     
       7. Drum brake shoe according to  claim 1 , characterized in that the cut-out ( 90 ) has a depth outwardly beyond the axial end ( 80 ). 
     
     
       8. Drum brake shoe according to  claim 1 , characterized in that the cut-out ( 90 ) has a depth outwardly beyond at least a portion the end terminal ( 66 ) when attached to the lever ( 50 ). 
     
     
       9. Drum brake comprising a shoe ( 4 ) including a rigid web ( 16 ) and a cylindrical part ( 8 ) that accepts a friction lining, characterized in that an interior edge of the web ( 16 ) has a cut-out ( 90 ) providing access to a brake cable ( 64 ) attachment end terminal ( 66 ) attached to a lever ( 50 ) comprising a cable-accommodating duct ( 60 ) formed with an inclined edge ( 62 ) which diverges from an axis (A) of the duct ( 60 ) towards a drum, the lever ( 50 ) also comprising a ferrule ( 70 ) for guiding the end terminal ( 66 ) when the cable ( 64 ) is being fitted, and an elastic leaf ( 74 ) capable of pushing the end terminal ( 66 ) as the end terminal ( 66 ) leaves the ferrule so as to house and hold part of the cable ( 64 ) in place in the closed end of the duct ( 60 ), in that the lever ( 50 ) has an outer edge, and in that the cut-out ( 90 ) has a depth outwardly beyond the outer edge of the lever ( 50 ) proximate an axial end ( 80 ) of the duct ( 60 ) to provide access to the end terminal ( 66 ) when attached to the lever ( 50 ). 
     
     
       10. Drum brake according to  claim 9 , characterized in that one end of the lever ( 50 ) is connected by a pivoting connection ( 52 ) to that end of the shoe ( 4 ) on which a main cylinder-actuated control ( 30 ) acts, the brake cable ( 64 ) being attached to the other end of the lever ( 50 ). 
     
     
       11. Drum brake according to  claim 10 , characterized in that the brake cable ( 64 ) slides in a sheath having end which bears against a backplate ( 2 ) of the drum brake and the end terminal ( 66 ) can be attached to the lever ( 50 ) blind when the drum is mounted on the backplate. 
     
     
       12. Drum brake according to  claim 9 , characterized in that the cut-out ( 90 ) has a depth outwardly beyond the axial end ( 80 ). 
     
     
       13. Drum brake according to  claim 9 , characterized in that the cut-out ( 90 ) has a depth outwardly beyond at least a portion the end terminal ( 66 ) when attached to the lever ( 50 ).